6G69

Crystal structure of a parallel seven-helix coiled coil CC-Type2-IL-Sg-L17E


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Maintaining and breaking symmetry in homomeric coiled-coil assemblies.

Rhys, G.G.Wood, C.W.Lang, E.J.M.Mulholland, A.J.Brady, R.L.Thomson, A.R.Woolfson, D.N.

(2018) Nat Commun 9: 4132-4132

  • DOI: 10.1038/s41467-018-06391-y
  • Primary Citation of Related Structures:  
    6G6B, 6G6A, 6G6D, 6G6C, 6G66, 6G65, 6G68, 6G67, 6G69, 6G6F

  • PubMed Abstract: 
  • In coiled-coil (CC) protein structures α-helices wrap around one another to form rope-like assemblies. Most natural and designed CCs have two-four helices and cyclic (C n ) or dihedral (D n ) symmetry. Increasingly, CCs with fiv ...

    In coiled-coil (CC) protein structures α-helices wrap around one another to form rope-like assemblies. Most natural and designed CCs have two-four helices and cyclic (C n ) or dihedral (D n ) symmetry. Increasingly, CCs with five or more helices are being reported. A subset of these higher-order CCs is of interest as they have accessible central channels that can be functionalised; they are α-helical barrels. These extended cavities are surprising given the drive to maximise buried hydrophobic surfaces during protein folding and assembly in water. Here, we show that α-helical barrels can be maintained by the strategic placement of β-branched aliphatic residues lining the lumen. Otherwise, the structures collapse or adjust to give more-complex multi-helix assemblies without C n or D n symmetry. Nonetheless, the structural hallmark of CCs-namely, knobs-into-holes packing of side chains between helices-is maintained leading to classes of CCs hitherto unobserved in nature or accessed by design.


    Organizational Affiliation

    School of Biochemistry, University of Bristol, Medical Sciences Building, University Walk, Bristol, BS8 1TD, UK. D.N.Woolfson@bristol.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CC-Type2-IL-Sg-L17EA, B, C, D, E, F, G, H, I, J, K, L, M, N32synthetic constructMutation(s): 0 
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MPD
Query on MPD

Download CCD File 
A, B, H, M
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
MRD
Query on MRD

Download CCD File 
H
(4R)-2-METHYLPENTANE-2,4-DIOL
C6 H14 O2
SVTBMSDMJJWYQN-RXMQYKEDSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.211 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.77α = 90
b = 66.77β = 90
c = 243.197γ = 120
Software Package:
Software NamePurpose
iMOSFLMdata reduction
Aimlessdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Engineering and Physical Sciences Research CouncilUnited KingdomEP/G036764/1
European Research CouncilUnited Kingdom340764

Revision History 

  • Version 1.0: 2018-10-17
    Type: Initial release
  • Version 1.1: 2019-01-23
    Changes: Data collection, Derived calculations